On 7 August 1914 a French corps attacked towards Mulhouse in Alsace and was immediately thrown back by the Germans. On 14 August, two weeks before Tannenberg and three weeks before the Battle of the Marne, the French 1st and 2nd Armies attacked into Lorraine, and on 20 August the German 6th and 7th Armies counterattacked. After forty-three years of peace, this was the first test of strength between France and Germany. In 1929, Karl Deuringer wrote the official history of the battle for the Bavarian Army, an immensely detailed work of 890 pages, chronicling the battle to 15 September. Here, First World War expert and former army officer Terence Zuber has translated and edited this study to a more accessible length, while retaining over thirty highly detailed maps, to bring us the first account in English of the first major battle of the Great War.